A family is grieving a mother and her unborn child who were killed after being struck by a car in Sydney's north.

A teenage driver with a provisional licence has been charged and now faces up to 10 years in prison.

The woman was with her husband and three-year-old son when she was hit while walking across the entrance to a car park on George Street in Hornsby about 8pm yesterday.

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A Kia Carnival turning into the car park of the Hornsby Railway Station stopped to let them pass.

A white BMW driven by a P-plater allegedly slammed into the back of the Kia, which then hit the woman.

Paramedics treated the 33-year-old, who was eight months pregnant, before she was rushed to Westmead Hospital in a critical condition.

Neither mother nor baby could be saved.

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NSW Police Traffic and Highway Patrol Command Assistant Commissioner David Driver said the crash was "very confronting" for first responders.

"It's particularly tragic when people pass away and indeed when there's children involved," Driver said.

"This is a terrible, terrible story."

P-plate driver Aaron Papazoglu was taken to hospital for mandatory testing before being allowed to go home to nearby Wahroonga.

Police who watched dashcam video of the incident arrested the 19-year-old about 12.45am on Millewa Avenue in Wahroonga.

He was taken to Hornsby Police Station and charged with dangerous driving occasioning death – drive manner dangerous, negligent driving (occasioning death) and cause loss of foetus – death of pregnant woman.

The legislation, known as Zoe's Law, was only introduced three years ago.

The 48-year-old man driving the Kia Carnival was not hurt.

Papazoglu remains behind bars to face Parramatta Local Court tomorrow.

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Upset neighbour described the owners of the property as a “lovely family”.

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Kmart has recalled kids sand over asbestos fears.

The retailer has issued a recall for a 14-piece Sand Castle Building Set and tubs of magic sand which come in blue, green and pink.

Kmart said the products were sold at Kmart stores and online, Target stores, online and via its app.

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The company says lab testing revealed some samples contained the potentially dangerous substance.

"The product is being recalled because the sand may include asbestos, which is a prohibited substance in Australia," the Kmart recall notice said.

"The product may cause a risk to health as asbestos has been detected in some samples after laboratory testing.

"Importantly, respirable asbestos has not been detected in any of the tested samples.

"The release of respirable asbestos fibres is unlikely to occur in its current state, unless the sand is processed by mechanical means such as crushing or pulverising.

"The risk that any asbestos found, that is likely to be airborne or fine enough for inhalation, is low."

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The products are among several ranges of sand kits to be recalled in recent days.

Customers have been told to stop using the products immediately and safely dispose of them.

"Wear disposable gloves and a mask and either return in the original tub or place the sand in a heavy-duty plastic bag and double tape it securely and keep it out of reach of children," the recall notice said.

"Do not dispose of the products in general waste."

Information on the disposal of asbestos waste, including disposal facilities in your state or territory can be found on The Asbestos and Silica Safety and Eradication Agency website.

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A security officer was accused of indecently assaulting a woman on community detention.

Search efforts are ongoing to find the other person who remains missing.

The Australian man charged with ambushing Ariana Grande this week claimed in June that he was planning on giving up his antics forever.

Johnson Wen pushed past photographers and charged at the actress while the cast made its way down a yellow carpet at the Wicked: For Good premiere.

Grande's co-star Cynthia Erivo separated Wen from Grande before security pulled him away.

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Wen had posted on Instagram late on Thursday that he was "free after being arrested".

However, on Friday afternoon, the 26-year-old was charged with being a public nuisance by a Singapore court.

The incident caused massive outrage in the city state and from fans online.

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Back in June, the serial stage and pitch invader interrupted Katy Perry's Sydney concert at Qudos Bank Arena.

Wen danced on stage and put his arm around Perry during her performance of Hot N Cold.

He was then forcibly rushed off the stage as the pop star quipped "well, there's never going to be another show like this, so just enjoy it Sydney".

The 26-year-old told 9News in June he planned to quit his stage-crashing ways.

"I said 'let me get on stage with you', then she (Katy Perry) freaked out because she realised I wasn't a performer," Wen said.

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"I was about to do like extra Fortnite moves but security got there too quick.

"I'm planning to quit forever because you get in way too much trouble for it, especially me, because I've done it so many times."

His hobby has taken him around the world, with stage invasions at the Olympics in Paris, the FIFA Women's World Cup, and the men's Cricket World Cup final in India.

"I just got on there, and as soon as I got tackled I got in a lot of trouble," he said of the invasion in India, saying "there was way too many security".

Wen claimed in June he's not a threat, but his actions exposed serious security flaws.

He was already banned from Olympic Park for storming The Weeknd's stage in October last year when he attended Qudos Bank Arena for Perry's concert.

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One central Christchurch resident said the weather had ‘gone crazy’.

A government worker, his wife and directors of a building company have been charged with fraud and corruption offences over a multi-million dollar government contract.

The trio from the Northern Territory are accused by the AFP of being involved in a conspiracy to influence the awarding of tenders to their company from the Department of Defence worth almost $71 million.

The worker allegedly "exploited his position to influence the allocation of building contracts to the building company and a subsidiary company owned by the co-conspirators."

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The AFP, supported by the Department of Defence and the National Anti-Corruption Commission (NACC), executed multiple search warrants on businesses and homes across greater Darwin on Friday.

They seized mobile phones and laptops, a gun, jewellery, $30,000 in cash and a small quantity of what's thought to be cocaine.

All three face multiple charges which carry up to 10 years in jail.

They include dishonestly gaining a benefit from a Commonwealth entity, namely the Department of Defence.

The Commonwealth employee was also charged with abuse of public office.

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AFP Superintendent Greg Davis said abuse of public office or corruption was "not only criminal but also a serious breach of public trust".

"Defrauding the Commonwealth is a crime that prevents public funds from being used to support the wider Australian community, and we will not hesitate to investigate suspected criminal activity to bring offenders to justice," Supt Davis said.